SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a934332c83be5dcad8fcb0734cfdb091ac601d448e013014ff94654d48e6febc' 
  AND token = 'OZUqKEGIlJfKUj7FviQJYmp6f4wZBP+hgFWdCET0k7Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}